Adds workaround for routing 169.254.x.x addresses

See: https://bugs.launchpad.net/quantum/+bug/1174657

cloudbaseinit/metadata/services/httpservice.py

@@ -16,10 +16,12 @@
 
 import posixpath
 import urllib2
+import urlparse
 
 from cloudbaseinit.metadata.services import base
 from cloudbaseinit.openstack.common import cfg
 from cloudbaseinit.openstack.common import log as logging
+from cloudbaseinit.osutils import factory as osutils_factory
 
 opts = [
     cfg.StrOpt('metadata_base_url', default='http://169.254.169.254/',
@@ -37,8 +39,38 @@ class HttpService(base.BaseMetadataService):
         super(HttpService, self).__init__()
         self._enable_retry = True
 
+    def _check_metadata_ip_route(self):
+        '''
+        Workaround for: https://bugs.launchpad.net/quantum/+bug/1174657
+        '''
+        osutils = osutils_factory.OSUtilsFactory().get_os_utils()
+
+        os_major_version = int(osutils.get_os_version().split('.')[0])
+        if os_major_version >= 6:
+            # 169.254.x.x addresses are not getting routed starting from
+            # Windows Vista / 2008
+            metadata_netloc = urlparse.urlparse(CONF.metadata_base_url).netloc
+            metadata_host = metadata_netloc.split(':')[0]
+
+            if metadata_host.startswith("169.254."):
+                if not osutils.check_static_route_exists(metadata_host):
+                    (interface_index, gateway) = osutils.get_default_gateway()
+                    if gateway:
+                        try:
+                            osutils.add_static_route(metadata_host,
+                                                     "255.255.255.255",
+                                                     gateway,
+                                                     interface_index,
+                                                     10)
+                        except Exception, ex:
+                            # Ignore it
+                            LOG.exception(ex)
+
     def load(self):
         super(HttpService, self).load()
+
+        self._check_metadata_ip_route()
+
         try:
             self.get_meta_data('openstack')
             return True